elliott



(No Model.) 2 Sheets-Sheet l, A. ELLIOTT. ELEVATOR GUARD.

Patented Feb. 21,1893.

UNITE STATES ABRAHAM ELLIOTT, OF ROCHESTER,

PATENT Fries.

ASSIGNOR TO THE EXCELSIOR ELE- VATOR GUARD AND HATCH COVER COMPANY, OFNEW YORK, N. Y.

ELEVATOR-GUARD.

SPECIFICATION forming part of Letters Patent No. 492,350, dated February21, 1893.

Application filed April 11, 1892.

To all whom it may concern.-

Be it known that I, ABRAHAM ELLIOTT, of Rochester, in the county ofMonroe and State of New York, have invented a certain new and usefulImprovement in Elevator-Guards, of which the following is aspecification.

This invention relates to that class of elevator guards or doors whichis opened by the movements of the elevator or car, and it consists inthe construction and novel arrangement of parts as hereinafter setforth.

In the accompanying drawings, Figure 1 is a front elevation of amechanism embodying my improvement. Fig. 2 is an enlarged verticalsection on the line y y of Fig. 1. Fig. 3 is a rear sectional elevationon the line 00 wof Fig. 2.

Similar letters of reference designate corresponding parts in all thefigures.

Referring by letter to the drawings, A designates a guard or door for anelevator shaft supported by hangers a 0t, each provided with a roller arunning upon a fixed track a The door, in Fig. l, is shown as closed andthe arrow indicates the direction of movement to open it. This door orguard A may be opened and closed automatically and I will now describethe mechanism employed therefor.

B designates a vertical shaft extending adjacent the elevator shaft andthe full length thereof, or from the lower floor to the top of the lastupper door or guard. This shaft is rotated, While the elevator is'inuse, by any suitable means such as an engine, and at each floor a clutchmechanism is provided between this shaft and a dooror guard, but, asthese several mechanisms are of similar construction, I have shown butone of them.

The clutch mechanism consists of clutch sections h b rigidly mounted onthe shaft and held in position by means of set screws b These clutchsections 1) b are here shown as having bearings in a boxing or casing Bsecured by screws or otherwise to a wall of the elevatorshaft above thedoor orguard. Clutch sections 12 Z) are loosely mounted on the shaft Band are movable lengthwise thereof to coact with the clutch sections 1)b. At their adjacent ends the clutch sections 6 b are provided withannular grooves into which arms 11 engage. The arms I) are integral withSerial No. 428,606. (No model.)

or are secured to a frame B movable vertically in the casing B. Thefront portion of the frame B may have anti-friction rollers b journaledto it to engage with the side walls of a vertical slot b in the front ofthe easing B.

Each clutch section b b has attached to it a bevel gear C which engagesat opposite sides with a bevel gear C having its shaft C extendingoutward through a bearing in the front of the frame B A sprocket wheel Cis attached to the projected end of the shaft C and a sprocket chain Cextends from the wheel C over the top of the door or guard to a sprocketwheel C This sprocket wheel C may be rendered adjustable to take up anyslack in the chain C by mounting it on a block 0 movable on a base a andheld in position by means of a set screw 0 One of the door hangers, hereshown as the door hanger a, is provided with an upward extension a whichengages with the sprocket chain 0 so that when said chain is moved thedoor or guard will also be moved.

D is a lever having oppositely extending arms cl d provided with cam orcurved surfaces. This lever D is pivoted at a point at one side of itsvertical center to a lug d extending from a plate D attached to a fixedwall and at the opposite side of its vertical center the lever has apivotal engagement with a lug d extending from the frame B E is a pushbar extending through an opening in the side wall of the elevator shaftand having a pivotal engagement with one arm of a bell cranklever Epivoted to a fixed bracket. A link E extends from the other arm of thebell crank lever E to a pivotal connection with the frame B I preferthis link E to have a slight longitudinal yield and I thereforeconstruct it of two sections 6 e. The upper section is in the form of abar or red and the lower section is in the form of a cylinder into whichthe lower end of the section 6 extends and is movable. A cushion in theform of a spiral spring e is interposed between the lower end of thesection 6 and the bottom or the section 6.

To prevent the section e from turning relatively to the section e, I mayprovide the section a with pins a which extend in to vertical Fig.2.

Ways or grooves e formed in lateral projections of the section 6, asshown in Fig. 2.

, F designates the elevator or car carrying a cam bar F for operatingagainst the push bar E during an upward or downward movement of the car.The cam bar F is shown as having a hinge connection at its lower endwith an upright F on the car F, and the upper portion of the bar F has atoggle link and lever connection F with the upright F By means of thistoggle link and lever connection, the cam bar F may be moved by anoperator into or out of the plane of the push bar E, so that it isoptional whether or not a door or guard at a certain floor shall beopened by the movement of the ear. The outer end of the pushbarE ispreferably provided with an anti-friction rollerf.

The operation is as follows. As the car ascends the upper end of the cambar F engages the push bar E and forces it longitudinally inward, andthis movement operating through the lever "and link E elevates the frame13 so that the clutch sections 1) Z9 engage. The rotating shaft B thusoperates the gears O O and the sprocket mechanism to open the door orguard. When the door is nearly closed a tapper g on the hanger a eugagesthe under side of the arm (Z of'the lever I) and forces said lever to asubstantially level position to draw the clutch sections out ofengagement and in the position shown in When the door is completelyopened the tappet g engages a notch g in the lever. These twopartsinterlocking will prevent the rebounding of the door. The lastmovement described, that is, the disengaging of the clutch sections 1) bcompresses the spring 8 but does not impart any movement to the bar Ebecause said bar is still in engagement with the cam F. Upon afurthermovement of the car to release the cam from the bar E,

the bar E is forced outward by the spring 6 and the clutch sections 1)19 fall into engagement and operate to close the door. Of course whenthe door is closed the clutch sections are disengaged by a tappet g onthe hanger a operating the lover I) in a manner as before described, andlocking with a notch g in the arm cl of the lever.

Having described my invention, what I claim is 1. In combination with anelevator guard or door, a vertical rotary shaft, clutch sections rigidlymounted thereon, clutch sections movable longitudinally on the shaft andconstructed to engage with the first named clutch sections, connectionsbetween said clutch sections and the guard or door, and alever,havingthe oppositely extending arms alternately engaged by the guard or doorto disengage clutch sections, substantially as specified.

2. In combination with an elevator guard or door and a car, a verticalrotary shaft, clutch sections rigidly mounted thereon,clutch sectionsmovable longitudinally on theshaft, a frame carrying the movable clutchsections, connections between said frame and the car whereby clutchsections are moved into en- 1 gagement, a sprocket mechanism between the1 guard or door and clutch mechanlsm whereby 3. In combination with anelevator car and I.

elevator shaft and a guard or door therefor, the vertical rotary shaft,clutch sections rigidly mounted thereon, clutch sections movablelongitudinally on the shaft,a gear wheel on each of the movable clutchsections, agear wheel meshing with the first named gear wheels, a chainoperated by the last named gear wheel and having a connection with theguard or door, a lever, having the oppositely extending arms alternatelyengaged by the guard or door to disengage clutch sections, and a cam onthe elevator operating to move clutch sections into engagement,substantially as specified.

4. In an elevator shaft guard or door actuatin g mechanism, thecombination with a vertical rotary shaft, of a sprocket mechanismengaging the guard or door, clutch mechanism on the shaft operating thesprocket mechanism, a vertically movable frame carrying portions of theclutch mechanism, a cam carried by an elevator car, a push bar operatedby the cam, a bell crank lever, and a link connection between the bellcrank lever and the frame carrying the clutch mechanism, the said linkcomprising two sections and a cushion providing a yielding connectionbetween the two sections, substantially as specified.

5. The combination with the elevator shaft guard or door, of thevertical rotary shaft, clutch mechanism substantially such as described,a sprocket mechanism between the clutch mechanism and guard or door, thelever D having the oppositely extending arms, and tappets carried by theguard or door for operating the lever to disengage clutch sections,substantially as specified.

6. In combination with the guard or door, the vertical rotary shaft andclutch mechanism, substantially such as described, of the sprocketmechanism engaging with the guard or door, tappets carried by the guardor door and the lever having the oppositely extending arms provided withthe cam surfaces and having the notches with which the tappets mayinterlock, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ABRAHAM ELLIOTT.

Witnesses S. O. EDMONDS, WM. A. POLLOOK.

